Those two sheets are a bit puzzling.......

At 7200rpm, the "after" sheet shows roughly a 100hp improvement, while at the same time using over 50lbs/hr less fuel.

The fuel flow at the end of the "after" pull(7700) is less than what it is at the beginning of the "before" pull(5800).

Averages at the bottom of the page;

Before - 320.1 lbs/hr
After - 237.2 lbs/hr

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads